NEW HERE? LEARN MORE
closeclose
Last visit was: 27 Apr 2024, 13:50 It is currently 27 Apr 2024, 13:50
Decision Tracker
My Rewards
New posts
New comers' posts

Close
GMAT Club Daily Prep
Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Go to My Error Log Learn more
Close
Request Expert Reply
Confirm Cancel

If 5a + 2b = 11 and 4a + 3b = 4, then a – b =

SORT BY:
Date
Kudos
Tags:
Find Similar Topics 
Show Tags
Hide Tags
User avatar
BrendaMSL
Intern
Intern
Joined: 07 Aug 2020
Posts: 5
Own Kudos [?]: 15 [1]
Given Kudos: 9
Send PM
If 5a + 2b = 11 and 4a + 3b = 4, then a – b = [#permalink] New post   Updated on: 06 Dec 2020, 08:38
1
Bookmarks
00:00
A
B
C
D
E

Difficulty:

5% (low)

Question Stats:

87% (01:06) correct 13% (02:06) wrong based on 84 sessions
Hide Show timer Statistics
If 5a + 2b = 11 and 4a + 3b = 4, then a – b =

a. -7
b. 25/7
c. 48/7
d. 7
e. 15
ShowHide Answer
Official Answer
D

Originally posted by BrendaMSL on 24 Aug 2020, 11:30.
Last edited by Bunuel on 06 Dec 2020, 08:38, edited 2 times in total.
User avatar
P
Nipungupta9081
School Moderator - INSEAD Masters
Joined: 07 Jan 2020
Posts: 510
Own Kudos [?]: 265 [1]
Given Kudos: 193
Location: India
GPA: 4
WE:Analyst (Accounting)
Send PM
Re: If 5a + 2b = 11 and 4a + 3b = 4, then a – b = [#permalink] New post   24 Aug 2020, 11:46
1
Kudos
BrendaMSL wrote:
If 5a + 2b = 11 and 4a + 3b = 4, then a – b =

Kindly put the options and follow the rules. :)
Also I have solved the question but kindly put the options for better clarity.
https://gmatclub.com/forum/rules-for-po ... l#p1092822

Bunuel please check

Posted from my mobile device
User avatar
L
CrackverbalGMAT
GMAT Club Legend
GMAT Club Legend
Joined: 03 Oct 2013
Affiliations: CrackVerbal
Posts: 4946
Own Kudos [?]: 7629 [1]
Given Kudos: 215
Location: India
Send PM
Re: If 5a + 2b = 11 and 4a + 3b = 4, then a – b = [#permalink] New post   24 Aug 2020, 11:50
1
Kudos
Top Contributor
The obvious approach would be to find individual values of a and b and then find a - b.

If we look a little closer, subtracting of the 2 equations is sufficient

5a + 2b - (4a + 3b) = 11 - 4

5a + 2b - 4a - 3b = 7

5a - 4a + 2b - 3b = 7

a - b = 7

Hope this Helps

Arun Kumar
User avatar
L
globaldesi
VP
VP
Joined: 28 Jul 2016
Posts: 1212
Own Kudos [?]: 1728 [0]
Given Kudos: 67
Location: India
Concentration: Finance, Human Resources
Schools: ISB '18 (D)
GPA: 3.97
WE:Project Management (Investment Banking)
Send PM
Reviews Badge
Re: If 5a + 2b = 11 and 4a + 3b = 4, then a – b = [#permalink] New post   24 Aug 2020, 21:40
BrendaMSL wrote:
If 5a + 2b = 11 and 4a + 3b = 4, then a – b =

a. -7
b. 25/7
c. 48/7
d. 7
e. 15


Usual way .
You have two equations solve for a and b and then subtract the values to get answer .

bt here if you look at equations
you can find that if you subtract 2 from 1 you get a -b
5a + 2b = 11
-(4a + 3b = 4)
=> 5a - 4a +2b-3b = 7
a- b = 7
Hence D is the answer straight

faster
User avatar
L
Abhishek009
Board of Directors
Joined: 11 Jun 2011
Status:QA & VA Forum Moderator
Posts: 6072
Own Kudos [?]: 4691 [0]
Given Kudos: 463
Location: India
GPA: 3.5
WE:Business Development (Commercial Banking)
Send PM
GMAT ToolKit User
Re: If 5a + 2b = 11 and 4a + 3b = 4, then a – b = [#permalink] New post   01 Sep 2020, 12:54
BrendaMSL wrote:
If 5a + 2b = 11 and 4a + 3b = 4, then a – b =

a. -7
b. 25/7
c. 48/7
d. 7
e. 15


5a + 2b = 11
4a + 3b = 4
____________

a - b = 7

Answer must be (D)
User avatar
L
v12345
Senior Manager
Senior Manager
Joined: 01 Mar 2015
Posts: 411
Own Kudos [?]: 914 [0]
Given Kudos: 36
Location: India
Send PM
Re: If 5a + 2b = 11 and 4a + 3b = 4, then a – b = [#permalink] New post   23 Aug 2021, 10:21
5a + 2b = 11
4a + 3b = 4

Subtracting,
a – b = 7
Hence, OA is (D).
User avatar
bumpbot
Non-Human User
Joined: 09 Sep 2013
Posts: 32714
Own Kudos [?]: 822 [0]
Given Kudos: 0
Send PM
Re: If 5a + 2b = 11 and 4a + 3b = 4, then a b = [#permalink] New post   13 Mar 2023, 13:51
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
GMAT Club Bot
gmatclubot
Re: If 5a + 2b = 11 and 4a + 3b = 4, then a b = [#permalink]
13 Mar 2023, 13:51
Moderators:
Bunuel
Math Expert
92959 posts
yashikaaggarwal
Senior Moderator - Masters Forum
3137 posts

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne
Main navigation
GMAT Resources
Partners
MBA Resources
www.gmac.com|www.mba.com | | GMAT Club Rules | Terms and Conditions